Reamer Assembly Base Plate Receiving Cavities
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Solution Overview
Problem
Existing sub-surface Horizontal Directional Drilling (HDD) reamers often experience unequal loading due to inconsistencies in component placement and welding, leading to premature bearing failures and uncut hole bottoms, and alternative configurations that provide uniformity require additional time, material, and expense.
Innovation Solution
The design features a reamer with receiving cavities on a base plate that precisely accommodate and affix roller cone leg/cone components, ensuring accurate and uniform attachment, which can be welded or attached via other means, enhancing the structural integrity and operational efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If roller cone leg/cone components are affixed to the reamer body using traditional welding methods, then the components can be attached, but inconsistencies in component placement and welding operations lead to unequal loading and operational failures
Solution Approach 1:
The receiving cavity is pre-formed in the reamer body at the correct location and orientation before the leg/cone components are attached. This preliminary positioning structure ensures that components are placed accurately and uniformly, eliminating placement inconsistencies that lead to unequal loading and operational failures.
Solution Approach 2:
The receiving cavity acts as an intermediary structure between the reamer body and the leg/cone components. It provides a precise interface that guides and constrains the components during attachment, ensuring uniform loading distribution and eliminating placement variability.
2Manufacturing precision
If exterior surface pockets and structural modifications are added to provide uniformity in leg/cone component attachment, then component uniformity is improved, but additional time, material, and expense are required
Solution Approach 1:
The receiving cavity integrates multiple functions into a single structural feature: it provides precise positioning, orientation, and support for the leg/cone components while serving as the attachment interface. This merging eliminates the need for separate exterior surface pockets and multiple structural modifications, reducing overall device complexity.
Solution Approach 2:
The receiving cavity serves multiple purposes simultaneously: it acts as a positioning feature, a support structure, and an attachment interface for the leg/cone components. This multi-functionality eliminates the need for additional specialized structures, reducing manufacturing complexity while maintaining high attachment uniformity.
Data Source
AI summary
Embodiments of a reamer of the present invention generally include a substantially tubular body sub, a substantially planar base plate having one or more receiving cavities disposed therein, one or more gussets, a fluid chamber, and a plurality of leg/cone assemblies having a leg end and a cone end; wherein the base plate is disposed around the body sub and stabilized by the gussets, and each leg end comprises an exterior surface geometry complementary to the interior surface geometry of a base plate receiving cavity and is insertable into and affixable therein. The receiving cavities are constructed in defined locations and orientations in the base plate and the leg/cone assemblies are precisely formed such that insertion of the leg end into the receiving cavity accurately and precisely disposes the cutting component about the reamer. Embodiments of methods of providing and using an apparatus of the present invention are also provided.